The W3C was founded in 1994 by Tim Berners-Lee at the Massachusetts Institute of Technology (https://www.w3.org/Consortium/facts.html). Since he wanted the world wide web to be open source, he did the same for the community of W3C. It is open to all types of organizations, businesses, and individuals (https://www.w3.org/Consortium/membership-faq). The membership fees vary on location, annual revenues, and type. The larger the group, the higher the cost (https://www.w3.org/Consortium/fees). The technology I found interesting was on a blog on W3C about linked data (https://www.w3.org/blog/2017/06/rdf-at-scale/). A couple of things that I discovered was that it is being used a lot for biomedical and pharmacological data. It is also being used to link lots of data in food and agriculture. This is also a type of Semantic Technology.
The Internet Society was created by individuals and organizations that recognized that the connection of society was important to evolve and globalize the internet and the technology around it. The closest Internet Society chapter is in North Carolina. This specific chapter focuses on online security (http://isoc-nc.org/About.html). Anyone can join the society. The minimum amount per year is $5,000 to become a member. It can go up to $100,000 per year. I do not recommend that a beginning web developer join this society because it costs too much and that person can learn about the internet just as well on their own.